Cross section measurements of a-induced reactions on Mo92,94 and Sn112 for p-process studies

The $^{92}\mathrm{Mo}$($\ensuremath{\alpha},n$)$^{95}\mathrm{Ru}$, $^{94}\mathrm{Mo}$($\ensuremath{\alpha},n$)$^{97}\mathrm{Ru}$, and $^{112}\mathrm{Sn}$($\ensuremath{\alpha},\ensuremath{\gamma}$)$^{116}\mathrm{Te}$ cross sections were measured at the upper end of the $p$-process Gamow window between 8.2 and 11.1 MeV. Our results are slightly lower than global Hauser-Feshbach calculations from the code NON-SMOKER, but still within the uncertainty of the prediction. The $^{112}\mathrm{Sn}$($\ensuremath{\alpha},\ensuremath{\gamma}$)$^{116}\mathrm{Te}$ cross section agrees well with a recently measured thick-target cross section in the same energy range. For the $^{92,94}\mathrm{Mo}$($\ensuremath{\alpha},n$) reactions the present data close to the reaction thresholds could eliminate previous uncertainties within a factor of 20, and we can present now useful comparisons to statistical model calculations with different optical potentials.